Class 300 Forged Carbon Steel Weld Neck, Raised-Face Flange for Schedule 160 Pipe
Class 300 A105/SA-105 Weld Neck Flange for Schedule 160 Pipe
The Class 300 ASTM A105/ASME SA-105 ASME B16.5 Forged Carbon Steel Weld Neck Raised-Face Flange for Schedule 160 Pipe provides a strong, permanent connection for demanding heavy-wall industrial piping systems. Its forged carbon steel construction, tapered weld neck, Schedule 160 bore, and raised-face sealing surface deliver excellent strength, alignment, and dependable long-term performance.
ASTM A105 / ASME SA-105 Forged Carbon Steel
Manufactured from ASTM A105 / ASME SA-105 forged carbon steel, this Class 300 weld neck flange provides excellent mechanical strength, toughness, and durability. A105/SA-105 is widely specified for pressure-containing components used in oil and gas, petrochemical processing, refineries, power generation, chemical processing, manufacturing, utilities, and industrial process piping systems.
The Class 300 designation identifies an ASME pressure class rather than a maximum operating pressure of 300 PSI. Actual allowable pressure depends on material, operating temperature, and applicable pressure-temperature ratings.
Weld Neck Design for Schedule 160 Pipe
A weld neck flange incorporates a long tapered hub that creates a gradual transition between the flange body and connecting pipe. The flange is butt welded directly to Schedule 160 pipe, creating a strong permanent joint while helping distribute mechanical and piping stresses through the tapered hub.
The flange bore can be machined to correspond with the Schedule 160 pipe wall thickness and inside diameter, providing proper internal alignment at the butt-weld connection.
Raised-Face Flange Construction
The raised-face (RF) flange features an elevated gasket seating surface surrounding the bore. This design concentrates bolting force over the gasket area, helping establish a reliable seal between compatible mating flanges.
Manufactured to applicable ASME B16.5 requirements, these Class 300 forged carbon steel flanges provide standardized dimensions, facing requirements, and pressure-temperature ratings.
When ordering, verify nominal pipe size, Schedule 160 bore, Class 300 rating, raised-face configuration, A105/SA-105 material, ASME B16.5 requirements, and service conditions for proper industrial piping system compatibility.